/* =============================================================
   VOLLEYBALL ROTATION SYSTEM — SHARED GLASSMORPHISM TOKENS
   Used by: glassmorphism-sample.html, editor-glassmorphism-sample.html
   ============================================================= */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.07);
  --glass-bg-hover: rgba(255, 255, 255, 0.12);
  --glass-bg-active: rgba(255, 255, 255, 0.18);
  --glass-border: rgba(255, 255, 255, 0.13);
  --glass-border-hover: rgba(255, 255, 255, 0.25);
  --glass-border-active: rgba(255, 255, 255, 0.3);
  --glass-blur: 16px;
  --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
  --glass-inset-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.08);

  /* Accent */
  --accent: #5eaeff;
  --accent-bg: rgba(94, 174, 255, 0.18);
  --accent-border: rgba(94, 174, 255, 0.4);
  --accent-glow: 0 0 16px rgba(94, 174, 255, 0.15);

  /* Success (completion state) */
  --success: #2ecc71;
  --success-bg: rgba(46, 204, 113, 0.18);
  --success-border: rgba(46, 204, 113, 0.4);
  --success-glow: 0 0 16px rgba(46, 204, 113, 0.15);

  /* Danger */
  --danger: #e74c3c;
  --danger-bg: rgba(231, 76, 60, 0.18);
  --danger-border: rgba(231, 76, 60, 0.4);

  /* Court / Player colours */
  --player-color: #efa581;
  --highlight-color: #f1c40f;
  --libero-color: #e74c3c;

  /* Text */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.6);
  --text-muted: rgba(255, 255, 255, 0.3);
}

html, body { height: 100%; overflow: hidden; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-primary);
  background:
    radial-gradient(ellipse at 15% 30%, rgba(94, 174, 255, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 15%, rgba(232, 132, 74, 0.15) 0%, transparent 45%),
    radial-gradient(ellipse at 50% 85%, rgba(74, 144, 164, 0.18) 0%, transparent 50%),
    radial-gradient(ellipse at 75% 60%, rgba(46, 204, 113, 0.08) 0%, transparent 40%),
    linear-gradient(135deg, #0c1520 0%, #162030 35%, #1a2840 65%, #0f1a28 100%);
  background-attachment: fixed;
}

/* ============================
   Glass Panel Base
   ============================ */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-inset-highlight);
  border-radius: 14px;
}

/* ============================
   App Navigation Shell
   ============================ */
.app-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
}

.app-nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-nav-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.3px;
}

.app-nav-hamburger {
  width: 36px;
  height: 36px;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  position: relative;
}

.app-nav-hamburger:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
}

.app-nav-hamburger.open {
  background: var(--glass-bg-active);
  border-color: var(--glass-border-active);
}

/* Dropdown menu */
.app-nav-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: rgba(20, 32, 46, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  padding: 6px;
  z-index: 300;
}

.app-nav-menu.open {
  display: block;
  animation: menu-fade-in 0.15s ease;
}

@keyframes menu-fade-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.nav-menu-item {
  display: block;
  padding: 10px 14px;
  border-radius: 10px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.15s ease;
  cursor: pointer;
}

.nav-menu-item:hover {
  background: var(--glass-bg-hover);
  color: var(--text-primary);
}

.nav-menu-item.active {
  background: var(--accent-bg);
  border: 1px solid var(--accent-border);
  color: var(--accent);
}

.nav-menu-sep {
  height: 1px;
  background: var(--glass-border);
  margin: 4px 6px;
}

.nav-coffee {
  color: rgba(255, 200, 120, 0.8);
}

.nav-coffee:hover {
  color: rgba(255, 200, 120, 1);
}

/* ============================
   Toggle Group (Switchable Buttons)
   — Serving/Receiving (viewer)
   — Court/Players/Config (editor)
   ============================ */
.toggle-group {
  display: flex;
  gap: 4px;
  border-radius: 14px;
  padding: 4px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.toggle-btn {
  flex: 1;
  padding: 11px 8px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: 11px;
  cursor: pointer;
  transition: all 0.25s ease;
  background: transparent;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}

.toggle-btn.active {
  background: var(--glass-bg-active);
  border-color: var(--glass-border-active);
  color: var(--text-primary);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.toggle-btn:not(.active):hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

/* ============================
   Zone Buttons (Setter 1–6 grid)
   ============================ */
.zone-btn {
  padding: 10px 6px;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 700;
  min-width: 36px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.zone-btn:hover {
  color: var(--text-primary);
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-active);
}

.zone-btn.active {
  background: var(--accent-bg);
  border-color: var(--accent-border);
  color: var(--accent);
  box-shadow: var(--accent-glow);
}

.zone-btn.complete {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
  box-shadow: var(--success-glow);
}

.zone-btn.complete.active {
  border-color: var(--accent-border);
  box-shadow: var(--accent-glow);
}

/* ============================
   Phase Buttons (Base/Serve/Attack)
   ============================ */
.phase-btn {
  padding: 9px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}

.phase-btn.active {
  background: var(--accent-bg);
  border-color: var(--accent-border);
  color: var(--accent);
  box-shadow: var(--accent-glow);
}

.phase-btn.complete {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
  box-shadow: var(--success-glow);
}

.phase-btn.complete.active {
  background: linear-gradient(135deg, var(--success-bg), var(--accent-bg));
  border-color: var(--accent-border);
  color: var(--accent);
  box-shadow: var(--accent-glow), var(--success-glow);
}

.phase-btn:not(.active):not(.complete):hover {
  color: var(--text-primary);
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-active);
}

/* ============================
   Action Buttons
   ============================ */
.btn {
  padding: 10px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-secondary);
}

.btn:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
}

.btn-primary {
  background: var(--accent-bg);
  border-color: var(--accent-border);
  color: var(--accent);
}

.btn-primary:hover {
  background: rgba(94, 174, 255, 0.28);
  box-shadow: var(--accent-glow);
}

.btn-danger {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger);
}

.btn-danger:hover {
  background: rgba(231, 76, 60, 0.28);
}